A theory of information inefficiency of markets

Conventional wisdom is that markets are information efficient. Alas, a simple game-theoretical model illustrates that value traders only have an incentive to invest in research and information if (i) information cost is low enough, (ii) the overall market is sufficiently clueless, and (iii) market makers do not suspect value traders of being well informed. This leaves ample scope for the overall market to remain inefficient, even in the long run, with undesirable consequences for society as a whole.

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An overview of financial crisis theories

Daniel Detzer and Hansjoerg Herr deliver a superb summary of timeless economic theories of financial crisis. The main focus is on (i) escalatory inflation and deflation dynamics caused by monetary policy, (ii) boom and bust investment cycles caused by herding and inefficient expectation formation, and (iii) speculative bubbles related to cognitive behaviour that is inconsistent with efficient markets.

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How Fed asset purchases reduce yield term premia

An updated Federal Reserve paper suggests that there has long been a link between the net supply of government securities and term premia on Treasury yields. A 1%-point reduction in the ratio of Treasuries or MBS (10-year equivalent) to GDP supposedly reduced the 10-year term premium by 10 basis points. A one-year shortening of the average effective duration would lower the ten-year Treasury yield by about 7 basis points. Based on these estimates, the 2008-2011 large scale asset purchase and maturity extension programs of the Federal Reserve could have reduced the 10-year term premium by a total of 150 basis points.

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Herding in financial markets

Herding is a deliberate decision to imitate the actions of others. In financial markets with private information herding can be efficient for an individual asset manager, but increases the risks that the market as a whole is inefficient and fragile, particularly in the case of “information cascades”. A paper of Michael McAleer and Kim Randalj provides empirical evidence of herding in a range of futures markets.

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Volatility insurance and exchange rate predictability

The cost of insuring against currency volatility can be measured as the difference between (options-based) implied volatility and (swaps-based) forward expected realized volatility. A case can be made that this insurance premium determines how much exposure risk-averse institutions are willing to accept. A new paper and blog post by Della Corte, Ramadorai, and Sarno claim that variations in volatility insurance costs can be the basis for a profitable currency trading strategy.

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The concept of “real financial exchange rates”

A Bundesbank paper proposes a new type of real exchange rate index. Rather than measuring the competitiveness of goods markets, this “real financial exchange rate” would measure the competitiveness of asset markets. There is some evidence that this indicator helps detecting overvaluation.

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Trend following in U.S. equities

Trend following is a systematic investment style that takes directional positions in accordance with the difference between the current price and a moving average. For longer moving averages most trend following strategies would have outperformed simple buy-and-hold and value-based strategies in U.S. equities for many decades. Moreover, the simplest rules have been the best: there has been no benefit in high-frequency trading, stop losses, and conventional complications.

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Central banks and equity market distress

A short Bundesbank paper presents evidence that the Federal Reserve, the ECB, and the Bank of England have long used policy rates to stabilize financial markets in times of distress. This would suggest that implicit ‘central bank puts’ are not new and that central banks’ tendency to stabilize markets in the past has not prevented serious market dislocations.

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Current accounts and foreign exchange returns

A research report by Jens Nordvig and his colleagues at Nomura shows that external (current account) surpluses have been a poor indicator of currency performance over the past 20 years. External deficits are often the consequence of growth outperformance, decreasing country risk premiums and capital inflows, and hence may be associated with currency strength rather than currency weakness.

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Risk premia strategies

Risk premia strategies can be defined as diversifiable investment styles with fundamental value and positive historic returns. Their main types are (i) absolute value and carry, (ii) momentum, and (iii) relative value. A Societe Generale research report argues that value generation of these styles may be more reliable than that of asset classes and more suitable for combination into diversified portfolios.

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